package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Administrator
 * Date: 2023-07-03
 * Time: 14:50
 */
public class DelOperation implements IOperation{

    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除的图书名字");
        String name = scanner.nextLine();

        int currentSize = bookList.getUsedSize();
        int delIndex = -1;
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                System.out.println("找到这本书了,开始删除");
                delIndex = i;
                break;
            }
        }
        if(i == currentSize){
            System.out.println("没有找到要删除的这本书");
            return;
        }
        for (int j = delIndex; j < currentSize-1; j++) {
            Book book = bookList.getBook(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(currentSize-1,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除图书成功");
    }
}
